EVLA%20Feed%20 - PowerPoint PPT Presentation

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EVLA%20Feed%20

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M&C conversion from current bus to FO already necessary. Mert. Author. EVLA ... Current X-band (8 8.8 GHz) will bolt on to new feed & work in EVLA antenna. ... – PowerPoint PPT presentation

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Title: EVLA%20Feed%20


1
EVLA Receivers PDR
  • Transition Planning

Daniel (Mert) Mertely
2
Requirements
  • All current bands available before, during, and
    after transition.
  • Receiver performance not degraded.
  • Need to test LO, MC, digitization/data
    transmission (FO) system early, on prototype.
  • Compressor capacity problemGet rid of 1020 frig.
  • Need space in vertex roomGet rid of A-rack.

3
Transition Planning
  • 1) Insure inter-operability between old FE new
    FH, LOs, MC, IF systems.
  • 2) Early assembly of wide-band K /or Q band
    receivers to test out entire system.
  • 3) C U bands high priority.

Mert
4
T-Plan Inter-operability
  • IF converter module part of EVLA sys for lt
    X-band.
  • Minor RX mods will allow attachment to new feeds.
  • MC conversion from current bus to FO already
    necessary.

Mert
5
T-Plan Inter-operability II
  • Current L-band (1340 1730 MHz), (with only
    modified phase shifter) will bolt-on to new FH
    work in EVLA antenna.
  • Current X-band (8 8.8 GHz) will bolt on to new
    feed work in EVLA antenna.
  • K Q will need new wide-band mixers to handle
    both the current C the EVLA X band IFs
    (planned). Need new LO chain (mixer, amp) for
    high-side injection (planned).

6
Early K Q
  • EVLA transition 7 K-band receivers include wide
    frequency mixersEarly prototypes.
  • Allows test of LO FO data transmission system
    early.
  • May/may-not include all 4 channels.

Mert
7
Early C U
  • C U band receivers needed early to avoid A-rack
    space complications extra compressor capacity
    requirements.
  • C-band has a VLBA as prototype.
  • U-band scaled from current VLA K-band.
  • U-band might slip if schedule problems develop
    (least harm).

Mert
8
FE Feed Delivery SchedulePrototypes
Hayward/Szpindor
9
FE Feed Delivery ScheduleProduction
Hayward/Szpindor
10
EVLA Receiver Production Schedule
--------------------------------
------------------------------------------------
2002 2003 2004
2005 2006 2007 2008 2009 2010
--------------------------
---------------------------------------------
- Modify Antennas
gt--1-7---gt--8-14--gt-15-21--gt-22-28--gt


Build/Install K
gt-2-gt---7----gt---7----gt---7----gt---7----gt
Build/Install Q
gt-2-gt---7----gt---7----gt---7----gt---7----gt


Build/Install C
gt---7----gt---7----gt---7----gt---7----gt-2-gt
Build/Install U
gt---7----gt---7----gt---7----gt---7----gt-2-gt


Build/Install L
gt-1-gt---3----gt---3----gt---8----
gt----8---gt----7---gt Build/Install X
gt-1-gt---3----gt---3----gt---8----
gt----8---gt----7---gt

Build/Install S
gt---3----gt---3----gt---7----
gt----9---gt----8---gt Build/Install A
gt---3----gt---3----gt---7----
gt----9---gt----8---gt
--------------------------------------------
----------------------------
2002 2003 2004 2005 2006
2007 2008 2009 2010
------------------------------------------
------------------------------ No. of Upgraded
Rxs 4 14 14 14
14 0 0 0 No. of New Rxs
0 14 16 26 26
34 36 30
---- ---- ---- ---- ----
---- ---- ---- Total per year
6 30 32 40 40
34 34 30
Hayward
11
EVLA Amplifier Production Schedule
----------------------------------------
----------------------------------------
2002 2003 2004 2005 2006
2007 2008 2009 2010
--------------------------------------------
---------------------------- Sub- Antennas
gt--1-7---gt--8-14--gt-15-21--gt-22-28-
-gt total

----- K-Amps
2 2 2 2 2 2 2 2 2 2 2 2
24 Q-Amps
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
32

C-Amps P4 4
4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
72 U-Amps P4 4 4
4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
72

L-Amps P4 2 2
2 2 2 2 2 2 2 2 4 4 4 4 4 4 4 4 4 4 4 4
72 X-Amps P4 2 2 2
2 2 2 2 2 2 2 4 4 4 4 4 4 4 4 4 4 4 4
72

S-Amps P4 2 2
2 2 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
72 A-Amps P4 2
2 2 2 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
72 ---------------------------------
---------------------------------------
2002 2003 2004 2005 2006
2007 2008 2009 2010
---------------------------------------------
--------------------------- Prototypes 0
8 8 8 0 0
0 0 0 Production 0 8
50 62 70 82 64 64
64 ---- ---- ----
---- ---- ---- ---- ----
---- Total/year 0 16 58 70
70 82 64 64 64
488
Hayward
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